A spherical conductor of radius 10 cm has a charge of \(3.2 \times 10^{-7} \mathrm{C}\) distributed…

A spherical conductor of radius 10 cm has a charge of \(3.2 \times 10^{-7} \mathrm{C}\) distributed uniformly. What is the magnitude of electric field at a point 15 cm from the centre of the sphere?
\(\left(\frac{1}{4 \pi \varepsilon_0}=9 \times 10^9 \mathrm{Nm}^2 \mathrm{C}^{-2}\right)\)
  1. 1.28×105 N C-1
  2. 1.28×106 N C-1
  3. 1.28×107 N C-1
  4. 1.28×104 N C-1

Solution

E=kQr2=9×109×3.2×10−715×10−22

E=1.28×105 N C-1

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Asked in: NEET 2020 (Phase 1)

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